Hey guys,
I am attempted to move our code built on the Yii 1 framework from our production stack to a different stack of servers. I am running into some issues. Currently, the issue I can getting is this error

The server technology is similar they are both Windows IIS sites with PHP 7.1 installed. I have checked and all the files that this error is calling exist. Anyone have any ideas on where to start? Also, is there any kind of wiki or guide for code migrations?